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Multicast Traffic Monitoring on a Nationwide Backbone Network
Tao HeNew Generation Network (NGN) Lab.
Department of Electronic and EngineeringTsinghua UNIV. P. R. China
[email protected] 2003
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Outline
Overview Multicast Network Analysis Research Basic Idea Our Feature Experimental Results Where are we going Summary
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Overview
Deployment of IP Multicast in CERNET
PIM-SM, MBGP, MSDP Multicast Network ManagementTraffic ManagementPerformance MonitoringCapacity Planning
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Multicast Network Analysis Research
K. Claffy at SDSC (Network Measurement)
Multicast Traffic Analysis K. Almeroth at UCSB (Mantra)Multicast Routing Information Analysis
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What’s the problem
High Speed ? (what about 1000Mbps)
Router Affected ? (Performance Influence to Router)
Too much Information means no information (We could not handle)
What we want ?
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Basic Idea
What’s important to us ?cost-effectiveease of handlingreduce effect on network Better SolutionTraffic Analysis at coarse-grained
level
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Basic Idea (cont.)
Aggregate the packet for generating small data sets – reduce the demand on storage
Ignore some flow attributes to reduce the complexity of post-processing – considering the essence of multicast traffic
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Our Feature
Stream exists during a specified time internal when traffic activity happens
Three aspects:directionality: unidirectionalendpoint granularity: host, IP block etc.functional layer: based on transmission
protocols
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Our Feature (cont.)
More about the information of the concept:
“A methodology for Analyzing Backbone Network Traffic at Stream-Level”, Tao He, Hui Zhang, Xing LI etc., ICCT’03, Beijing P. R. China, April 2003.
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Experimental Results
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Experimental Results (cont.)
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Experimental Results (cont.)
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Experimental Results (cont.)
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Experimental Results (cont.)
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Where are we going
Develop the measurement system for monitoring gigabyte Ethernet links
fine-grained and coarse-grained analysis
Combination with multicast routing information
Others (monitoring tools, security etc.)
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Summary
Little demand or large demand? How to monitor and manage? What should that be? What’s the next?
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Summary (cont.)
Statistical Characteristics of IP Multicast in CERNET shows that we should need understand the essence of multicast
More tools adaptive to monitor multicast network should be paid more attention
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Thank you Q & A ?